Improvement in compounds for artificial stone



l 106. COMPOSITIONS, EXamIllGI comma 0R PLASTlC Cross Reference UNITED P T F E- 1'0 all whom it may concern:

' of Washington, in the county'of Washington,

exact description thereof.

ingredients 1 add two parts of cm her CHARLES SOHAFFER, OF WASHINGTON, nrsrraicr OF COLUMBIA, sssreson "ro GEORGE w. (BOOK, OF sum PLACE.

IMPROVEMENT INTCOMPOUNDS FOR ARTIFICIAL STONE.

Specification forming part of Letters Patent IIo. 188,679, dated March 20, 1877; application filed March7. 1877.

. Be it known that 1, CHARLES SCHAFFER,

and in the District of Colum bia, have invented certain new and useful Improvements in Man-- nfacture of Artificial Stone; and do hereby declare that the following is a full, clear, and

The nature of my invention consists in making an artificial stone, in the manner hereinafter described.

To enable those skilled in the art to make and use my invention, I will proceed to describe its'construction and use.

I first take one part of Portland cement and onepart'of fine sand. mix these thoroughly together and then sift them. To these stone of any color, or of mixed colors. mm ma e mnnontoniposeu of'sa'lfcylic acid one part to three hundred 'parts 0 water an add sufiioient zinc white tomalie the mass of about the emf molasses.

When this has been done I mix all of the in- Y gradients together-thoroughly, and mold in any shape desired. After set and dried I place the blocks in a kiln or room having a temperature of 60 to 65 Fahrenheit for from two tothree days.

The blocks are then'rea'dy for grinding and polishing.

Tiles and blocks formed in this manner are susceptible of a very high degree of polish, and are as durable, or more so, than natural stone and marble. 4

Having thus fully described my'inventiou, what I claim as new, and desire to secure by Letters Patent, isv An artificial stone, composed .of Portland cement, sand, crushed marble or stone, salicylic acid, water, and zinc white, compounded substantially in the proportions, and treated as herein specified.

In testimony that I claim the foregoing I have hereunto set my hand this 23d day of February, 1877.

CHARLES SGHAFFER. Witnesses:

- FRANK GALT,

HENRY N. MILLER. 

